Feank joseph ushek



F. 1. USHER. CYLINDRICAI. CUTTER HEAD FOR PLANING MACHINES.

APPLICATION FILED AUGJO. I917- Patented Sept. 9, 1919.

Frank-J Usher FRANK J'OSEPH'USHER; ormnrnnvjfnmrisireonniuiarzi, CANADA.

GY LINDRICAL oUmrERaaz-nnn EURPBIJIANEENGJ-MACHINESJ specifica tion of Lette-rsnatenti patent ed sept; 931919.!

App1ication. filed August 20, 191.1 Serial 181,192..

To all whomm't may concern:

Be. it known that I, FRANK J USHE a citizen of theUnited States; residing at] J affi'eyi, British Columbia in the Dominion of. Canada, have invented a new and useful Improvement in Cylindrical Cutter-Heads for Planing-Machines, of which the following; is a specification.

Thisinvention relates to improvements in cutter heads for. planing. machines, andhas for: oneofits objects to provide means for; easily. and positively fastening, the cutter" knives. in. said heads.

A further object. of the invention is to provide means for looseningithe. knives so that they may be easily removed for. sharpenmg.

A. further objectis to provide means fhr keeping the alinernent of knives true throughout their length. l s j Still further ob'ects and features of! the invention. will be more. fully described" in connection: with: the accompanying draw.- ings, and will be more particularly pointed outin and by the appended claims. I e

Inthe drawing h t F'gure lis. a contracted plan view ofthe cutter head with'twoknives in place:

Fig; 2 is an end viewof the 'cutter head with two knives in place. U y Fig. 3 is a view ofone-knife in place on its holding plate. j Fig. 4- is a. fragmentary seotionalview through. the. cutter head showing one knife secured. in position, andtaken on line 0 :0 ofFig. 1.

Fig. 5 is a. sectihnal view taken on line A- -A of Fig. 3. i

Fig. 6. is a sectional. view taken on line B-B ofFig. 3. I Fig.7 is a perspective view of the. extension block used when the cuttingknife has worn. down considerably.

Fig. 8 is a perspective view of the block used in. adjusting. the alinement of the knives. e.

Like numerals refer to the same parts throughout the various figures of the draw mg; l

Describing in detail the device. ofmy in vention 1= designates a cylindrical cutter head body and 2. the knives, which are his tened in the cylindrical body. 3represents knife holding plates. 4 represents the wedge blocks used for tightening. the knives and plates. 5 is the drawing sekscrew used in Brien; of the, blocks. 4,. having on it s upper port on. 6 ,-threads in one directioii as for 1nstaincef and on its lower per tlon 7,, .threads. inthe. opposite direction .(or

left hand);-.. Atiits ,center is a smooth por tion. 8..

Groozees Shaving knifeand wedge block receiving. portions 38 and. 9f are provided: in 1 the cylindrical body, 1.. 1' These grooves have The hlocks a; have threaded. hole-s as indi; ed @125- nd ave QQ Q S BJ e n s at thetops. of. said holes; When the recesses or -eoun-ten-sunk port-ions 13,] fill with} pitch, the wrench. should. be. heated; to. meltthe pitch, whereupon, the. wrench can, readily be applied. to. the. heads .1 of the; screws. It: will be; noted; that the screws 5 are disposed. withilthe ir axes. inclined to the knife and with the; heads..cj fiiiliXei sorews farthest from theknifahdjtheir bases nearest to the knife.

e 65 spaced threaded. horesl lO in. shoulders 11 1 Thuswhen ar douhlelthreadedor sa mj tial. screws 5,.a.i: e.turned in one" direction, the ,wedge block 41,; will be advanced toward and.ag'a1nst. the plate 3, while it turned in not. only "be drawn away from plate 3, but it will be retraotedback into the block re ceiving. portion-so asentirelyto. free the knifereceivingfportion for withdrawalor insertioniofi'thefknifet Further, because the screws. 51 are. threaded in the block, as well as in the eutte1*head, the wedge blocks will not only be positively: loosened, hut will positivelylbe held. in a knife releasing posi tion. Theknives 2fare fast nedto the plates 3 hymearisbfcountersunk screws 141 The plates, are lsupportedw [in spaced; relation on itssupporting' plate has one or more the knife 2. An adjusting screw 23 passes through a threaded hole 24C in the L portion L 25 atthe lease ofthe plate 3. Said" adjusting;

195 screws 16,.Qrnerefclarly sho vvnlinFig 3, to hold the. lem a infthedesired degree of setprojeotion. Each kliifewhen mounted screw has alsmooth cylindrical end 26 which .j enters a"socket27otblockl8. Block jection 31 fits the recess 30 of knife2. The plates 3 have at each end a series ofstaggered threaded holes 32. The knives 2 have at "each end near the base a single countersunk,' smooth, circular hole 33. Flat head screws '14 are adapted to be passed through holes 33 and into holes in the plate 32.

' along the base 15. I thenplace the wedge When in such position the ends of the screws 14: will be flush with the surface of plate 3, and therefore will not interfere with the knife abutting uniformly against the side of the recess 9 when in place.

In assembling my cutter head, I take knife 2 and place its surface against the surface 37 ofplate 3,1bringing the holes 33, into registry with selected'holes 32, so as to give me the desired'general projection of the knife edge to compensate for wear of the knife. I

then adjust the 't'wo'joutermost screws 16 to vgive theknife the fine Fset projection and to'm'ake this set projection uniform for all [the knives, IWhen the knife and the plate 7 are thus secured andlined up, I adjust the balance of the screwslG to just make contact b-locks'in position and by turning setserews '5, advance them securely' against the plates 3 to hold the knives in' the desired degree of set projection. WVhen all of the knives have been thus secured in place, the cutter head is ready for service.

itself is convex. To remedy this trouble I make use of the alinement device 17, as

It. sometimes happens after sharpening knives that the center portionof the knife at the'cutting edge islower than the outer edges. In other words,that the cutting edge above described. By tightening screw 23, the knife 'isstressedin its own plane and the cutting edge of the knife is straightened into perfeetalinernent. 'Whenthe' knife becomes l thin throughrepeated sharpening, I insert the extension block 22, and in this way am ableto use ashorter threaded'space on the screw 23. V

. In removing knives from my cutter head I turn the set-screw 5in the oppos te (III'GC-V tion from that which tightened the wedge block 4:.- This movement because of the double thread of my set-screw, forcibly lifts the wedge block 4 out of its recess, and because of the angle of the axis of the set-screw 5 with respect to the plane of the knife, the

wedge b ock l is moved away from the knife, leaving the latter entirely free for its easy'removal. This feature is a decided advantage over-those now uin use, and greatly facilitates the easy removal of knives for I sharpening or replacements.

Now it will be clear that not only in making the general adjustment, to compensate for wear, by means of screws 14, and holes 32 and'33, but also in making the fine adjustment, by means of screws 16, all such adjustment can be made in the sharpening room and without stopping the planing machine. 'For instance, a separate set of knives can be maintained in the sharpening room, ready for insertion, and when they are inserted in the cutter head body, the knives will not only have the proper set projection of the cutting edge, but all the knives will have a uniform degree of projection from the cutter head, irrespective of wear of the knives.

It will also be noted that when the knife is being stressed to strengthen the cutting edge, the knife is rigidly held in a fixed positionon plate 3, by screws 14, and after the knife has been stressed until its edge is straightened, it is held by that means which has been employed to stress the knife. In other words, the knife is not released after its edge is straightened.

While I have herein described one specific embodiment of my invention, I do not wish to be limited thereto, except for such limitations as the claims may impart.

I claim:

1. In a rotary cutter head structure for planing machines, a cutter head body provided with a groove having a knife receiving portion and a wedge block receiving portion and the latter having a face inclined from the radial and lengthwise parallel with the knife, a knife for insertion into the knife portion of said groove, a wedge block for the block receiving portion of said groove and having an inclined face for engagement with the inclined face of said groove, and a set screw having right and left hand thread sections, one section having threaded con nection in said body and the other section having threaded connection in said wedge block, whereby rotative adjustment of said screw in one direction will. actuate said wedge block to wedge lock the knife, and rotative adjustment in another direction will positively loosen and hold said block in a loosened position and free from obstructing projection with respect to the knife portion of said groove.

2. In a rotary cutter head structure for planing machines, a cutter head body provided with a groove having a knife receiving portion and a wedge block receiving portion, a knife for insertion into the knife portion of said groove with the butt edge of the knife radially innermost and the cutting edge radially outermost, a wedge block for the block portion of said groove, and a differential set screw having threaded connection with said body and block and extending alongside said knife but at an angle 1,3115g5se:

wood planing, machines, a cutter head body provided with a knife receiving groove, a knife and a knife holder in smoothabutting engagement wlth each otherand adapted for insertion into said groove, said knife and holder having portionscooperating in combination with detachable means acting independently of said head body for rigidly fastening said knife and holder to each other in different positions with respect to each other prior to insertion thereof into said groove for securing said knife in an in or out position on said holder according to wear of the knife.

4. In a rotary cutter head structure for planing machines, a cutter head body provided with a knife receiving groove, a knife and a knife holding plate adapted for insertion into said groove, and adjusting devices on said plate for engagement with a portion of said groove for regulating the set of said knife, whereby said knife may be adjusted to a set position prior to insertion into said head, and means for rigidly fastening said knife to said plate.

5. In a rotary cutter head structure for planing machines, a cutter head body provided with a knife receiving groove, a knife and a knife holding plate adapted for insertion into said groove, means forfastening said knife in different positions on said plate acording to the Wear of said knife to obtain general uniformity of set of all the knives prior to insertion into said body, and adjustable devices on said plates for engagement with a portion of said grooves for obtaining a uniform set of all the knives irrespective of the eXtent of wear.

6. In a rotary cutter head structure for planing machines, a cutter head body pro vided with a knife receiving groove, a knife and a knife holding plate adapted for insertion into said groove, means for fastening said knife to said plate in any one of a plurality of positions according to the extent of sharpening wear of said knife, and adjusting devices on said plate adjustable prior to insertion into the head and coacting with a portion of said groove for sup porting the knife at the proper set.

7. In a rotary cutter head structure for planing machines, a cutter head body provided with a' knife receiving groove, a knife and a knife holding plate adapted for insertion into said groove, means for fastening said knife to said plate in abutting re lation side by side and in any one of a plu rality of different positions according to the wear of said knife, said plate having an L- flange on its lower edge, and a plurality of adjusting screws in threaded engagement with said fiangevand adapted for abutment against the bottom of said groove to support said knife in the: required set positioirin said body..

SwAsiw av means for alining the: planing,

edge: ofian integrals planing knife, a knife holdingfi plate, a knife for I said plate, means for fastening: the? ends: of saida knife to said plate to obtain the: required projection of said knife edge, and means on said plate for engaging cent'rah portionof said knife tost1ess the knife in its own plane until the cutting or planing edge is straightened.

9. In a rotary cutter head structure for planing machines, a cutter head body provided with a knife receiving groove, a knife and a knife holding plate adapted to be inserted in said groove, means for fastening the ends of the knife to the plate prior to insertioinineans on said plate for engagement with a central portion of the knife to stress the knife in its own plane and straighten the cutting edge prior to insertion and holding the knife to a straight edge after insertion, and means for coaction with saidplate and a portion of said groove for supporting the knife at the proper set.

10. In a rotary cutterliead structure for planing machines, a cutter head body having a groove provided with a knife and a wedge block portion, and a set screw having right and left hand threaded sections, one section engaging said body and the other section engaging said block, and said screw being set at such an angle that when loosening adjustment is applied thereto the screw will loosen the wedge block and draw it away from the knife portion of said groove.

ing face inclined from the radial, a knife for insertion into said knife receiving portion, a one plece wedge block for the block receiving portion of said groove having an inclined face for engagement with the inclined face of said block receiving portion for bodily movement of the block parallel with and toward the knife to be held, and a set screw having right and left hand threaded sections, one section having threaded connection with said body and the other section.

having threaded connection with said block, and said screw being inclined to the knife with its head farthest and its base nearest the knife, whereby rotative adjustment of said screw in one direction will bodily actuate said block to wedge-lock said knife and rotative adjustment of said screw in another direction will positively loosen and move said block away from said knife receiving portion and free the latter from obstructing projection by said block.

' 12.-In a rotary cutter head struoture for Wood planing machines, a cutter head body provided-With a knife receiving g knife and a knife holder adapted for insertion into said groove, said holder and knife having openings .at their ends, and pins adapted for insertion through said openings for rigidly fastening said knife and holder together With the knife in different positions Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, 1). JG.

of in or out set prior to insertion of 10 the holder and knife into said groove.

In testimony whereof, I hereby affix my signature in the presence of two Witnesses.

FRANK JOSEPH USHER.

' NVitnesses: A. P. AILENOT,

A. P. BARROMAN.

roove, V a 

